include/acpi/acpi_bus.h

   1 /*
   2  *  acpi_bus.h - ACPI Bus Driver ($Revision: 22 $)
   3  *
   4  *  Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
   5  *  Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
   6  *
   7  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   8  *
   9  *  This program is free software; you can redistribute it and/or modify
  10  *  it under the terms of the GNU General Public License as published by
  11  *  the Free Software Foundation; either version 2 of the License, or (at
  12  *  your option) any later version.
  13  *
  14  *  This program is distributed in the hope that it will be useful, but
  15  *  WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  *  General Public License for more details.
  18  *
  19  *  You should have received a copy of the GNU General Public License along
  20  *  with this program; if not, write to the Free Software Foundation, Inc.,
  21  *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  22  *
  23  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  24  */
  25
  26 #ifndef __ACPI_BUS_H__
  27 #define __ACPI_BUS_H__
  28
  29 #include <linux/device.h>
  30
  31 #include <acpi/acpi.h>
  32
  33 /* TBD: Make dynamic */
  34 #define ACPI_MAX_HANDLES        10
  35 struct acpi_handle_list {
  36         u32 count;
  37         acpi_handle handles[ACPI_MAX_HANDLES];
  38 };
  39
  40 /* acpi_utils.h */
  41 acpi_status
  42 acpi_extract_package(union acpi_object *package,
  43                      struct acpi_buffer *format, struct acpi_buffer *buffer);
  44 acpi_status
  45 acpi_evaluate_integer(acpi_handle handle,
  46                       acpi_string pathname,
  47                       struct acpi_object_list *arguments, unsigned long long *data);
  48 acpi_status
  49 acpi_evaluate_reference(acpi_handle handle,
  50                         acpi_string pathname,
  51                         struct acpi_object_list *arguments,
  52                         struct acpi_handle_list *list);
  53
  54 #ifdef CONFIG_ACPI
  55
  56 #include <linux/proc_fs.h>
  57
  58 #define ACPI_BUS_FILE_ROOT      "acpi"
  59 extern struct proc_dir_entry *acpi_root_dir;
  60
  61 enum acpi_bus_removal_type {
  62         ACPI_BUS_REMOVAL_NORMAL = 0,
  63         ACPI_BUS_REMOVAL_EJECT,
  64         ACPI_BUS_REMOVAL_SUPRISE,
  65         ACPI_BUS_REMOVAL_TYPE_COUNT
  66 };
  67
  68 enum acpi_bus_device_type {
  69         ACPI_BUS_TYPE_DEVICE = 0,
  70         ACPI_BUS_TYPE_POWER,
  71         ACPI_BUS_TYPE_PROCESSOR,
  72         ACPI_BUS_TYPE_THERMAL,
  73         ACPI_BUS_TYPE_POWER_BUTTON,
  74         ACPI_BUS_TYPE_SLEEP_BUTTON,
  75         ACPI_BUS_DEVICE_TYPE_COUNT
  76 };
  77
  78 struct acpi_driver;
  79 struct acpi_device;
  80
  81 /*
  82  * ACPI Driver
  83  * -----------
  84  */
  85
  86 typedef int (*acpi_op_add) (struct acpi_device * device);
  87 typedef int (*acpi_op_remove) (struct acpi_device * device, int type);
  88 typedef int (*acpi_op_start) (struct acpi_device * device);
  89 typedef int (*acpi_op_suspend) (struct acpi_device * device,
  90                                 pm_message_t state);
  91 typedef int (*acpi_op_resume) (struct acpi_device * device);
  92 typedef int (*acpi_op_bind) (struct acpi_device * device);
  93 typedef int (*acpi_op_unbind) (struct acpi_device * device);
  94 typedef void (*acpi_op_notify) (struct acpi_device * device, u32 event);
  95
  96 struct acpi_bus_ops {
  97         u32 acpi_op_add:1;
  98         u32 acpi_op_start:1;
  99 };
 100
 101 struct acpi_device_ops {
 102         acpi_op_add add;
 103         acpi_op_remove remove;
 104         acpi_op_start start;
 105         acpi_op_suspend suspend;
 106         acpi_op_resume resume;
 107         acpi_op_bind bind;
 108         acpi_op_unbind unbind;
 109         acpi_op_notify notify;
 110 };
 111
 112 #define ACPI_DRIVER_ALL_NOTIFY_EVENTS   0x1     /* system AND device events */
 113
 114 struct acpi_driver {
 115         char name[80];
 116         char class[80];
 117         const struct acpi_device_id *ids; /* Supported Hardware IDs */
 118         unsigned int flags;
 119         struct acpi_device_ops ops;
 120         struct device_driver drv;
 121         struct module *owner;
 122 };
 123
 124 /*
 125  * ACPI Device
 126  * -----------
 127  */
 128
 129 /* Status (_STA) */
 130
 131 struct acpi_device_status {
 132         u32 present:1;
 133         u32 enabled:1;
 134         u32 show_in_ui:1;
 135         u32 functional:1;
 136         u32 battery_present:1;
 137         u32 reserved:27;
 138 };
 139
 140 /* Flags */
 141
 142 struct acpi_device_flags {
 143         u32 dynamic_status:1;
 144         u32 bus_address:1;
 145         u32 removable:1;
 146         u32 ejectable:1;
 147         u32 lockable:1;
 148         u32 suprise_removal_ok:1;
 149         u32 power_manageable:1;
 150         u32 performance_manageable:1;
 151         u32 wake_capable:1;     /* Wakeup(_PRW) supported? */
 152         u32 force_power_state:1;
 153         u32 reserved:22;
 154 };
 155
 156 /* File System */
 157
 158 struct acpi_device_dir {
 159         struct proc_dir_entry *entry;
 160 };
 161
 162 #define acpi_device_dir(d)      ((d)->dir.entry)
 163
 164 /* Plug and Play */
 165
 166 typedef char acpi_bus_id[8];
 167 typedef unsigned long acpi_bus_address;
 168 typedef char acpi_device_name[40];
 169 typedef char acpi_device_class[20];
 170
 171 struct acpi_hardware_id {
 172         struct list_head list;
 173         char *id;
 174 };
 175
 176 struct acpi_device_pnp {
 177         acpi_bus_id bus_id;     /* Object name */
 178         acpi_bus_address bus_address;   /* _ADR */
 179         char *unique_id;        /* _UID */
 180         struct list_head ids;           /* _HID and _CIDs */
 181         acpi_device_name device_name;   /* Driver-determined */
 182         acpi_device_class device_class; /*        "          */
 183 };
 184
 185 #define acpi_device_bid(d)      ((d)->pnp.bus_id)
 186 #define acpi_device_adr(d)      ((d)->pnp.bus_address)
 187 char *acpi_device_hid(struct acpi_device *device);
 188 #define acpi_device_name(d)     ((d)->pnp.device_name)
 189 #define acpi_device_class(d)    ((d)->pnp.device_class)
 190
 191 /* Power Management */
 192
 193 struct acpi_device_power_flags {
 194         u32 explicit_get:1;     /* _PSC present? */
 195         u32 power_resources:1;  /* Power resources */
 196         u32 inrush_current:1;   /* Serialize Dx->D0 */
 197         u32 power_removed:1;    /* Optimize Dx->D0 */
 198         u32 reserved:28;
 199 };
 200
 201 struct acpi_device_power_state {
 202         struct {
 203                 u8 valid:1;
 204                 u8 explicit_set:1;      /* _PSx present? */
 205                 u8 reserved:6;
 206         } flags;
 207         int power;              /* % Power (compared to D0) */
 208         int latency;            /* Dx->D0 time (microseconds) */
 209         struct acpi_handle_list resources;      /* Power resources referenced */
 210 };
 211
 212 struct acpi_device_power {
 213         int state;              /* Current state */
 214         struct acpi_device_power_flags flags;
 215         struct acpi_device_power_state states[4];       /* Power states (D0-D3) */
 216 };
 217
 218 /* Performance Management */
 219
 220 struct acpi_device_perf_flags {
 221         u8 reserved:8;
 222 };
 223
 224 struct acpi_device_perf_state {
 225         struct {
 226                 u8 valid:1;
 227                 u8 reserved:7;
 228         } flags;
 229         u8 power;               /* % Power (compared to P0) */
 230         u8 performance;         /* % Performance (    "   ) */
 231         int latency;            /* Px->P0 time (microseconds) */
 232 };
 233
 234 struct acpi_device_perf {
 235         int state;
 236         struct acpi_device_perf_flags flags;
 237         int state_count;
 238         struct acpi_device_perf_state *states;
 239 };
 240
 241 /* Wakeup Management */
 242 struct acpi_device_wakeup_flags {
 243         u8 valid:1;             /* Can successfully enable wakeup? */
 244         u8 run_wake:1;          /* Run-Wake GPE devices */
 245         u8 always_enabled:1;    /* Run-wake devices that are always enabled */
 246         u8 notifier_present:1;  /* Wake-up notify handler has been installed */
 247 };
 248
 249 struct acpi_device_wakeup_state {
 250         u8 enabled:1;
 251 };
 252
 253 struct acpi_device_wakeup {
 254         acpi_handle gpe_device;
 255         u64 gpe_number;
 256         u64 sleep_state;
 257         struct acpi_handle_list resources;
 258         struct acpi_device_wakeup_state state;
 259         struct acpi_device_wakeup_flags flags;
 260         int prepare_count;
 261         int run_wake_count;
 262 };
 263
 264 /* Device */
 265
 266 struct acpi_device {
 267         int device_type;
 268         acpi_handle handle;             /* no handle for fixed hardware */
 269         struct acpi_device *parent;
 270         struct list_head children;
 271         struct list_head node;
 272         struct list_head wakeup_list;
 273         struct acpi_device_status status;
 274         struct acpi_device_flags flags;
 275         struct acpi_device_pnp pnp;
 276         struct acpi_device_power power;
 277         struct acpi_device_wakeup wakeup;
 278         struct acpi_device_perf performance;
 279         struct acpi_device_dir dir;
 280         struct acpi_device_ops ops;
 281         struct acpi_driver *driver;
 282         void *driver_data;
 283         struct device dev;
 284         struct acpi_bus_ops bus_ops;    /* workaround for different code path for hotplug */
 285         enum acpi_bus_removal_type removal_type;        /* indicate for different removal type */
 286 };
 287
 288 static inline void *acpi_driver_data(struct acpi_device *d)
 289 {
 290         return d->driver_data;
 291 }
 292
 293 #define to_acpi_device(d)       container_of(d, struct acpi_device, dev)
 294 #define to_acpi_driver(d)       container_of(d, struct acpi_driver, drv)
 295
 296 /* acpi_device.dev.bus == &acpi_bus_type */
 297 extern struct bus_type acpi_bus_type;
 298
 299 /*
 300  * Events
 301  * ------
 302  */
 303
 304 struct acpi_bus_event {
 305         struct list_head node;
 306         acpi_device_class device_class;
 307         acpi_bus_id bus_id;
 308         u32 type;
 309         u32 data;
 310 };
 311
 312 extern struct kobject *acpi_kobj;
 313 extern int acpi_bus_generate_netlink_event(const char*, const char*, u8, int);
 314 void acpi_bus_private_data_handler(acpi_handle, void *);
 315 int acpi_bus_get_private_data(acpi_handle, void **);
 316 extern int acpi_notifier_call_chain(struct acpi_device *, u32, u32);
 317 extern int register_acpi_notifier(struct notifier_block *);
 318 extern int unregister_acpi_notifier(struct notifier_block *);
 319
 320 extern int register_acpi_bus_notifier(struct notifier_block *nb);
 321 extern void unregister_acpi_bus_notifier(struct notifier_block *nb);
 322 /*
 323  * External Functions
 324  */
 325
 326 int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device);
 327 void acpi_bus_data_handler(acpi_handle handle, void *context);
 328 acpi_status acpi_bus_get_status_handle(acpi_handle handle,
 329                                        unsigned long long *sta);
 330 int acpi_bus_get_status(struct acpi_device *device);
 331 int acpi_bus_get_power(acpi_handle handle, int *state);
 332 int acpi_bus_set_power(acpi_handle handle, int state);
 333 bool acpi_bus_power_manageable(acpi_handle handle);
 334 bool acpi_bus_can_wakeup(acpi_handle handle);
 335 #ifdef CONFIG_ACPI_PROC_EVENT
 336 int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data);
 337 int acpi_bus_generate_proc_event4(const char *class, const char *bid, u8 type, int data);
 338 int acpi_bus_receive_event(struct acpi_bus_event *event);
 339 #else
 340 static inline int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data)
 341         { return 0; }
 342 #endif
 343 int acpi_bus_register_driver(struct acpi_driver *driver);
 344 void acpi_bus_unregister_driver(struct acpi_driver *driver);
 345 int acpi_bus_add(struct acpi_device **child, struct acpi_device *parent,
 346                  acpi_handle handle, int type);
 347 int acpi_bus_trim(struct acpi_device *start, int rmdevice);
 348 int acpi_bus_start(struct acpi_device *device);
 349 acpi_status acpi_bus_get_ejd(acpi_handle handle, acpi_handle * ejd);
 350 int acpi_match_device_ids(struct acpi_device *device,
 351                           const struct acpi_device_id *ids);
 352 int acpi_create_dir(struct acpi_device *);
 353 void acpi_remove_dir(struct acpi_device *);
 354
 355 /*
 356  * Bind physical devices with ACPI devices
 357  */
 358 struct acpi_bus_type {
 359         struct list_head list;
 360         struct bus_type *bus;
 361         /* For general devices under the bus */
 362         int (*find_device) (struct device *, acpi_handle *);
 363         /* For bridges, such as PCI root bridge, IDE controller */
 364         int (*find_bridge) (struct device *, acpi_handle *);
 365 };
 366 int register_acpi_bus_type(struct acpi_bus_type *);
 367 int unregister_acpi_bus_type(struct acpi_bus_type *);
 368 struct device *acpi_get_physical_device(acpi_handle);
 369
 370 struct acpi_pci_root {
 371         struct list_head node;
 372         struct acpi_device * device;
 373         struct acpi_pci_id id;
 374         struct pci_bus *bus;
 375         u16 segment;
 376         struct resource secondary;      /* downstream bus range */
 377
 378         u32 osc_support_set;    /* _OSC state of support bits */
 379         u32 osc_control_set;    /* _OSC state of control bits */
 380         u32 osc_control_qry;    /* the latest _OSC query result */
 381
 382         u32 osc_queried:1;      /* has _OSC control been queried? */
 383 };
 384
 385 /* helper */
 386 acpi_handle acpi_get_child(acpi_handle, u64);
 387 int acpi_is_root_bridge(acpi_handle);
 388 acpi_handle acpi_get_pci_rootbridge_handle(unsigned int, unsigned int);
 389 struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle);
 390 #define DEVICE_ACPI_HANDLE(dev) ((acpi_handle)((dev)->archdata.acpi_handle))
 391
 392 int acpi_enable_wakeup_device_power(struct acpi_device *dev, int state);
 393 int acpi_disable_wakeup_device_power(struct acpi_device *dev);
 394
 395 #ifdef CONFIG_PM_SLEEP
 396 int acpi_pm_device_sleep_state(struct device *, int *);
 397 int acpi_pm_device_sleep_wake(struct device *, bool);
 398 #else /* !CONFIG_PM_SLEEP */
 399 static inline int acpi_pm_device_sleep_state(struct device *d, int *p)
 400 {
 401         if (p)
 402                 *p = ACPI_STATE_D0;
 403         return ACPI_STATE_D3;
 404 }
 405 static inline int acpi_pm_device_sleep_wake(struct device *dev, bool enable)
 406 {
 407         return -ENODEV;
 408 }
 409 #endif /* !CONFIG_PM_SLEEP */
 410
 411 #endif                          /* CONFIG_ACPI */
 412
 413 #endif /*__ACPI_BUS_H__*/